[FFmpeg-cvslog] avfilter/vaf_spectrumsynth: don't use uninitialized variable as scale

[Kacper Michajłow]

ffmpeg | branch: master | Kacper Michajłow <kasper93 at gmail.com> | Thu Jul 17 01:34:33 2025 +0200| [6302ff1fd92648ad11e3ee52f3a72b79ee4a7e6f] | committer: Kacper Michajłow

avfilter/vaf_spectrumsynth: don't use uninitialized variable as scale

scale was never initialized. av_tx_init() will use default scale if we
pass NULL.

Fixes: b3117f376d1c50b3c39befe27cbba12d5c0f80da
Signed-off-by: Kacper Michajłow <kasper93 at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6302ff1fd92648ad11e3ee52f3a72b79ee4a7e6f
---

 libavfilter/vaf_spectrumsynth.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vaf_spectrumsynth.c b/libavfilter/vaf_spectrumsynth.c
index a2f797ec6f..04d354d504 100644
--- a/libavfilter/vaf_spectrumsynth.c
+++ b/libavfilter/vaf_spectrumsynth.c
@@ -149,7 +149,7 @@ static int config_output(AVFilterLink *outlink)
     int height = ctx->inputs[0]->h;
     AVRational time_base  = ctx->inputs[0]->time_base;
     AVRational frame_rate = inl0->frame_rate;
-    float factor, overlap, scale;
+    float factor, overlap;
     int i, ch, ret;
 
     outlink->sample_rate = s->sample_rate;
@@ -184,7 +184,7 @@ static int config_output(AVFilterLink *outlink)
     s->win_size = s->size * 2;
     s->nb_freq = s->size;
 
-    ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 1, s->win_size, &scale, 0);
+    ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 1, s->win_size, NULL, 0);
     if (ret < 0) {
         av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
                "The window size might be too high.\n");